A D V A N C E I N F O R M A T I O N
AC CHARACTERISTICS
Asynchronous Read
Parameter
JEDEC Standard Description
78, 79, 73, 74 98, 99, 93, 94
Unit
ns
tCE
tACC
Access Time from CE# Low
Max
Max
Min
Min
Min
Max
Min
70
70
90
90
Asynchronous Access Time (Note 1)
AVD# Low Time
ns
tAVDP
tAAVDS
tAAVDH
tOE
12
5
ns
Address Setup Time to Rising Edge of AVD
Address Hold Time from Rising Edge of AVD
Output Enable to Output Valid
ns
7
ns
20
10
20.5
10.5
ns
Read
0
ns
Output Enable Hold
Time
tOEH
Toggle and
Data# Polling
Min
10
ns
tOEZ
tCAS
Output Enable to High Z (Note 2)
CE# Setup Time to AVD#
Max
Min
ns
ns
0
Notes:
1. Asynchronous Access Time is from the last of either stable addresses or the falling edge of AVD#.
2. Not 100% tested.
CE#
tOE
OE#
tOEH
WE#
DQ0
tCE
tOEZ
DQ15
-
Valid RD
tACC
RA
A21-A0
tAAVDH
tCAS
AVD#
tAVDP
tAAVDS
Note: RA = Read Address, RD = Read Data.
Figure 18. Asynchronous Mode Read with Latched Addresses
44
Am29BDS640G
May 9, 2002
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